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One of the skeletons found beneath Coleg Menai in Llangefni, Wales. Credit: Archaeology Wales.

Mysterious Mass Grave Found in Wales May Contain Bodies of Vikings’ Slaves


Archaeologists have uncovered a mysterious mass grave dating back 1,600 years in Wales containing the remains of 86 individuals. Researchers are now attempting to explain strange characteristics regarding the people’s age, gender and race. Could these remains be those of slaves brought there by the Vikings?

The discovery was made by experts from Archaeology of Wales on the island of Anglesey. While carrying out a survey of a local college, the Coleg Menai in Llangefni, they found 32 skeletons in 2016. According to Wales Online, a further 54 were unearthed when a link road was built next to the college between the town in 2017.

Enigmatic Burial Grounds

The skeletons were taken away from the site for further tests and it was determined that the graves dated from approximately 1,600 years ago. The Daily Mail reports that ‘‘They were likely buried in the early medieval period after the Romans left Britain’’. This is the period known as the Dark Ages when civilization virtually collapsed in Europe. In the British Isles, it was a period of endemic warfare and when the Anglo-Saxon kingdoms of Wessex, Northumberland, and Mercia started to emerge.

Researchers carried out an isotope analysis of the remains in order to identify their origins. They expected to find that the remains were of local people who had died in the Dark Ages. Instead, they found that the skeletons included those of people who came from across Europe.

“Some individuals came from western Britain, where the border is today between England and Wales, a couple from Scandinavia and a couple from Mediterranean places like Spain,” said Dr. Irene Garcia Rovira of Archaeology Wales [via Wales Online].

Some of the bones from the ancient burial ground. Credit: Archaeology Wales.

Some of the bones from the ancient burial ground. Credit: Archaeology Wales.

Vikings and slaves

This was remarkable because in the aftermath of the collapse of the Roman Empire, long-distance travel was believed to have been virtually impossible because of war and a breakdown in the trade network.  The experts were baffled as to how so many people from so far away came to rest in an island off the North coast of Wales, and why.

In the period when the individuals were interred in the cemetery, the island of Anglesey was controlled by the Viking kingdom of Dublin. It appears that many Irish settlers migrated to the island. Dublin at this time was one of the centers of the slave trade in Europe. Those who were buried in the graves were possibly slaves that had been brought to Anglesey by the Vikings based in Ireland. However, it appears that Anglesey was only under the control of the Dublin Norse for a few years and why so many people from so far away were buried at the site is still a mystery.  

Could the bodies belong to slaves captured by the Vikings? (public domain image)

Could the bodies belong to slaves captured by the Vikings? (public domain image)

Enigmatic Skeletons

The origin of the dead was not the only peculiarity about the skeletons. The Daily Mail reports that the ‘‘experts were puzzled to find the mass grave included more females than males’’. Why this is the case is unknown. The majority of the remains came from people who died in their mid-forties. Dr. Rovira stated that ‘‘though young by today's standards, was relatively long-lived for the time'’ reports the World News Net

To add to the mystery of the cemetery, not many grave goods were found. A 2 nd century AD Celtic brooch was among the few items retrieved. A Roman coin was also uncovered. These items date to a period much earlier than when the dead were buried in the cemetery.

The CEO of the college, Dafydd Evans has pledged to collaborate with the authorities to put any artifacts uncovered on display at the local Oriel Ynys Mon museum.

There is expected to be more work carried out at the site. This may help to solve the mystery of burial grounds and its skeletons, which could potentially radically change our knowledge about the Dark Ages.  However, it seems that the remarkable and peculiar graves will remain a mystery for some time to come.

Top image: One of the skeletons found beneath Coleg Menai in Llangefni, Wales. Credit: Archaeology Wales.

By Ed Whelan



The dates are not the only thing about this item that may be wobbly.  It also contains the idiotic, math-challenged statement that 40 years of age was “old” for that time period.  The “PhD” that made said statement should be forced to retake Statistics 101.  Or maybe even high-school Math.

AnnieLaurie Burke

Crasslee's picture

I'm glad you pointed that out. I think it should read 1200 or 1100 years ago.


Chuck Pro's picture

Wouldn’t an age estimate of 1600 years BP put these remains more than 4 centuries before the Viking Kingdom of Dublin? And some 370 years before what is generally considered the start of the Viking age itself? Shoot, Rome didn’t even withdraw from Britain until 410 (basically about 1600 years ago) and there was an emperor of sorts in Rome for nearly 8 decades after that.


Ed Whelan's picture


My name is Edward Whelan and I graduated with a PhD in history in 2008. Between 2010-2012 I worked in the Limerick City Archives. I have written a book and several peer reviewed journal articles. At present I am a... Read More

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